GENERIC NAMES OF BUTTERFLIES 231 



difference in spelling is sufficient to prevent any two generic names from ranking as homonyms 

 of one another. Accordingly, the name Euripus Doubleday is not invalid under the Law of 

 Homonymy and the name Idrusia Corbet, proposed as a replacement for it, is itself invalid as 

 a junior objective synonym. 



1LERDA Doubleday, 1847, List. Spec. Up. Ins. Brit. Mus. 2 : 25. Type-species by monotypy : 

 Polyommatus epicles Godart, [1824], Ency. me"th. 9 (Ins.) (2) : 646. 



Doubleday cited other nominal species also, but these were all manuscript species, Polyom- 

 matus epicles thus becoming type-species by monotypy. 



ILIADES Hiibner, [1819], Verz. bekannt. Schmett. (6) : 88. Type-species by selection by 

 Scudder (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 196) : Papilio memnon Linnaeus, 

 Sysl. Nat. (ed. 10) 1 : 460. 



ILIANA Bell, 1937, Amer. Mus. Novit. No. 914 : 8. Type-species by original designation : 

 Miami romulus Bell, 1937, ibid. No. 914 : 9. 



ILMA Swinhoe, 1905, Ann. Mag. nat. Hist. (7) 16 : 613. Type-species by monotypy : lima 

 jovina Swinhoe, 1905, ibid. (7) 16 : 613. 



The taxon represented by the nominal species lima jovina is currently treated subjectively 

 on taxonomic grounds as the same as that represented by the older-established nominal species 

 Lychnuchus irvina Plotz, 1886 (Stett. ent. Ztg 47 : 88). 



IMELDA Hewitson, 1870, Equal. Lep. Buckley (4) : 56. Type-species by monotypy : Imelda 

 glaucosmia Hewitson, 1870, ibid. (4) : 56. 



INACHIS Hiibner, Verz. bekannt. Schmett. (3) : 37. Type-species by monotypy : Papilio 

 io Linnaeus, 1758, Syst. Nat. (ed. 10) 1 : 472. 



INCISALIA Scudder, 1872, 4th Ann. Rep. Peabody Acad. Sci. 1871 : 52. Type-species by 

 original designation : Licus niphon Hiibner, [1823], Zutr. z. Samml. exot. Schmett. 2 : 7, 

 pi. [36], figs 203, 204. 



This name has sometimes been attributed to Minot. This is due, no doubt, to the fact that, 

 as stated by Scudder, it was first proposed by Minot in manuscript. 



INDALASA Moore, 1880, Trans, ent. Soc. Lond. 1880 (4) : 166. Type-species by monotypy : 

 Mycalesis moorei Felder (C.) & Felder (R.), [1867], Reise Fregatte " Novara " (3) : 502, 

 pi. 67, fig. 9. 



INDOXYLIDES Doherty, 1889, /. asiat. Soc. Bengal, Pt II, 58 (4) : 410 nota. Type-species 

 by monotypy : Oxylides tharis Geyer, [1837], in Hiibner, Zutr. z. Samml. exot. Schmett. 5 : 22, 

 pi. [152], figs 883, 884. 



Doherty introduced the name Indoxylides in a footnote to his treatment of the genus 

 Eooxylides de Niceville ; he explained that he had intended to establish a genus under the 

 name Indoxylides for Oxylides tharis, that he had so informed de Niceville in correspondence 

 but that this communication had reached de Niceville too late, de Niceville having decided to 

 introduce Eooxylides, a name of his own devising, for this genus ; in the circumstances the 

 name Eooxylides de Niceville was the correct name for this genus. It must be added however 

 that Doherty's final conclusion was incorrect for a reason of which at the time he was doubtless 

 unaware. This arises from the fact that at the time when de Niceville's paper containing the 

 new name Eooxylides was in the hands of the printer, Doherty also had the present paper in an 

 advanced stage of preparation, in which, on the basis of the information which he had received 

 from de Niceville, he himself had introduced the name Eooxylides which he duly attributed to 

 de Niceville, believing that that name had already been published by de Niceville. Actually 

 at the time of the publication of Doherty's paper that of de Niceville was still unpublished ; 

 for the paper by de Doherty containing the name Eooxylides was published in December, 1889, 

 while de Niceville's paper did not appear until February 1890. Thus, although Doherty was 

 anticipated by de Niceville in the choice of a name (Eooxylides in place of Doherty's suggested 

 name Indoxylides) , he became by an odd chance the first author to publish a name (Eooxy- 



